How can you tell when a guy is lying.

I thank you from the advice and I wanted to know how could I know if he is the right one and how can you tell when a guy is lying...be truthful man to women

if he's the right one, you'll know, you'll feel it. and as far as knowing when someone lies... can't be judged by me. I can tell if my friends lie to me at times, because as you get to know people, you learn their character. so when they do something out the ordinary, in a situation of question, they're either lying or not telling you something at the time. some people have nervous offsets of lying. meaning, they twiddle their thumbs, or look around and not directly at you, or try to over convince you. its hard to determine, its all based on an individual. the only thing that works in general, is catching someone in a lie, by the story not being straight.

If someone doesn't tell the truth, then that means that he's not being honest.
How you can tell if a guy lies or not, by their manner, the way they tell you things, they might not have a good heart, they might tell you something you might believe but, they tell you that no, I lied, or if you intarigate them.
I've had that happen to me where a few men lied to me. Look into this person's heart. And see if he's really honest.

I learned this in Psychology, today .
When a guy is lying, or anyone else they usually look to the left and up (they'd probably be looking to your right, if you're standing face to face with them). because that is the creative part of there brain. My teacher said it just happens, like you don't mean to do it, but it definitely shows you're lieing.